MASA/MASAP Mudsill Anchors

Installation

View step-by-step installation instructions

Mudsill anchors have always been a time-saving alternative to anchor bolts, and the new MASA anchors provide even greater load-carrying capacity than our original MAS. As a result, the MASA provides an alternative for 5/8" and 1/2" mudsill anchor bolts on 2x, double-2x and 3x mudsills. It also eliminates the need for 3" square plate washers for seismic design and, in some cases, has load capacities that meet or exceed the parallel and perpendicular to plate shear capacity of other cast-in-place anchors. Two versions of the MASA are available – the standard MASA for installation on standard forms and the MASAP for panelized forms.

The MASA and MASAP are code listed by ICC-ES under the 2006 and 2009 IBC® and IRC® and have been tested to meet the requirements of ICC-ES acceptance criteria AC-398 for cracked and uncracked concrete. New test data is reflected in the table below.

Material: 16 gauge

Finish: Galvanized, all available in ZMAX® coating. See Corrosion Information.

Installation:

Use all specified fasteners. See General Notes.
MASA/MASAP
- Concrete shall have a minimum f'_c = 2500 psi.
- Spalling — Contact Simpson Strong-Tie for load reductions. Any exposed portion of the mudsill anchor must be protected against possible corrosion.
- For prescriptive anchor spacing refer to table.
- Testing shows that these mudsill anchors can be used in lieu of code required anchor bolts and square washer in high seismic zones. Refer to flier F-MASA for additional information.

These products are available with additional corrosion protection. Additional products on this page may also be available with this option, check with Simpson Strong-Tie for details.

Loads are based on allowable stress design (ASD) and include the load duration factor C_D (with C_D = 1.6) for wind/earthquake loading. No further increase is allowed. Reduce where other loads govern.
Minimum concrete compression strength, f'_c is 2500 psi.
. Allowable loads are based on a minimum stemwall width of 6".
For simultaneous loads in more than one direction, the connector must be evaluated using the Unity Equation.
Per Section 1613 of the 2006 IBC, detached one- and two-family dwellings in SDC C may use the "Wind and SDC A&B" allowable loads.
For designs under the 2006 IBC in SDC D-F, a 3x sill plate is required when the allowable design shearwall shear load is equal to or greater than 600 plf. If the allowable design shear load is greater than 350 plf but less than 600 plf, it is acceptable to use a 2x sill plate provided that the sill is anchored using double the number of MASA mudsill anchors required by design.
For designs under the 2009 IBC, sill plate size shall comply with the shearwall requirements of the 2008 Special Design Provisions for Wind and Seismic. MASA spacing shall be as required for design load.
MASA/MASAP may be installed using 7-nails (triangle holes not filled) when being used to replace a 1/2" diameter sill bolt for use on a 2x mudsill.
Nails : 10dx1 1/2" = 0.148" dia. x 1 1/2" long. See other nail sizes and information.

"Prescriptive" denotes designs per the IRC or conventional provisions of the IBC.
Detached one- and two-family dwellings in SDC C may use the "Wind & SDC A&B" spacing.
Spacing is based on the parallel to plate load direction only.
5/8" diameter AB required in SDC E.
When replacing 1/2" sill bolts use 7-10dx1 1/2" nails (minimum nailing) and when replacing 5/8" sill bolts use 9-10dx1 1/2" nails (maximum nailing).
Per Section 1613 of the 2006 IBC, detached one- and two-family dwellings in SDC C may use the "Wind and SDC A&B" allowable loads.

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Alternate Installation For Inside of Wall Continuity Alternate Installation For Brick Ledges

Step 1: Attach MASA 3 1/2" from inside of form. After concrete cures, remove nails and bend straps up 90°	Step 2: Place mudsill on concrete and nail MAS/MASA over mudsill.	Alternate MASA Installation for Brick Ledges



MASA/MASAP Rim Joist or Blocking Installation in Concrete over Max. 1/2" Sheathing

					Legacy Reports
	IAPMO ES ER	ICC-ES ESR	CITY OF LOS ANGELES	STATE OF FLORIDA	ICC-ES NER	ICC-ES ER	ICC-ES ES
MASA		ESR-2555 / ESR-2523 *	RR25851	FL13326
MASAP		ESR-2555 / ESR-2523 *	RR25851	FL13326

* ESR-2523 is an Index of many of Simpson Strong-Tie Stamped and Welded Cold-formed Steel Products for Wood or Cold-formed Steel Construction

Download the Simpson Strong-Tie® AutoCAD® Menu, which allows you to insert Ortho views directly into your AutoCAD drawing.

	ORTHOGRAPHIC	PERSPECTIVE
MASA	MASA: DWG \| DXF MASA front view: DWG \| DXF MASA left view: DWG \| DXF MASA right view: DWG \| DXF	High Wind-Resistant Construction D50: Sill Plate to Foundation: DWG \| DXF MASA: DWG \| DXF
MASAP	MASAP: DWG \| DXF MASAP front view: DWG \| DXF MASAP left view: DWG \| DXF MASAP right view: DWG \| DXF	MASAP: DWG \| DXF